In a surprise criticism of Microsoft, the UK government's schools computer agency, has warned that deploying Vista carries too much risk and that its benefits are unclear. Becta, the British Educational Communications and Technology Agency, said on Wednesday that it 'strongly recommends' schools do not deploy Microsoft's next operating system within the next 12 months. And in a further dig at Microsoft, Becta argues there are no 'must-have' features in Vista and that "technical, financial and organisational challenges associated with early deployment currently make [Vista] a high-risk strategy."